Ore-crusher.



E. A. WALL.

ORE GRUSHER.

APPLIUATION FILED JUNE 25, 1912.

1,044,833,; S Patented N0v.19,1912.

WITNESSES INVENTOR A [10mg ENOS A. WALL, or SALT LAKE CITY, UTAH.

ORE-CRUSHER.

To all whom it may concern:

Be it known that I, ENos A. VVALL, a citizen of the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Ore-Crushers, of which the following isa specification.

My invention relates to ore crushers of the roll type.

The object of my invention is to provide means whereby fragments of rock and mineral ores ranging in size from four inches to twelve or more inches in diameter may be broken into particles of one and one half inch diameter and smaller by impact of hammer-like blows imparted from projecting ribs or bars upon the rotating rolls and by subsequent pressure between the intermeshing teeth of said rolls. To accomplish this result I construct and mount in heavy frames a pair of rolls similar in all respects to my corrugated crushing rolls patented April l, 1911, No. 988,749, except that instead of the rounded ribs there shown I pro vide the rolls with approximately square shouldered tooth-like ribs, preferably of alternately differing lengths and widths, as shown in drawings. But these inner shorter teeth may be omitted and the other teeth be spaced a greater or less distance apart, according to the size to which the rock or ore is to be reduced. If a coarse product is desired, the teeth should be placed several inches apart, but if a comparatively fine product is desired the intervening spaces between the large teeth should be provided with one or more ribs shorter and narrower than thelarger ribs. The purpose of these short ribs is to prevent large fragments of rock from lodging between the large ribs and being carried around and discharged without being sufficiently broken or pulverized. With the intervening short teeth such oversize lumps would be further crushed by pressure of the intermeshing long teeth. This object I attain by the mechanism shown in the accompanying drawing, in which Figure 1 is a sectional side elevation of my improved ore crusher, and Fig. 2 is a plan thereof.

A designates the frame having fixed bearings a, yielding bearings a, and guide rods a and springs a for pressing the bearings a toward the bearings a, as is usual in this class of machines.

B, B are the parallel crushing rolls, the

Specification of Letters Patent.

Application filed June 25, 1912.

Patented Nov. 19, 1912. Serial No. 705,755.

shafts I), b of which are mounted in the bearings a, a, respectively. The roll shafts are provided with long-tooth drive gears C, C which mesh together, and the shaft 6 is provided with a large drive pulley C for imparting a high peripheral speed to the rolls B, B.

Each roll has a series of longitudinal spaced parallel ribs B angular in cross sec tion and wider at their outer edges. The ribs B of one roll register or mesh with the spaces between the like ribs of the other roll, but the ribs of the two rolls do not contact at any time. These ribs B are square shouldered at their outer working faces so that when the rolls are rotated at a high speed the outer corner edges of the ribs will strike the pieces of rock or ore with hammer-like blows which break off fragments of the rock. These fragments fall into the spaces between the ribs of one roll and the grooves of the other roll, where they are subjected to a crushing action.

lVhen a still finer product is required, the rolls are provided between the larger ribs B with shorter, narrower ribs B parallel with the ribs B It will be seen from Fig. 1 that the larger ribs B when in horizontal opposition to ribs B will crush the material much finer than would be the case were the ribs B omitted and the spaces between ribs B made that much deeper.

Rock or ore in size from four to twelve inches and more may be broken into particles of one and a half inches and smaller by the hammer-like blows and subsequent crushing action of the square shouldered ribs.

The distance between the ribs B and their radial lengths may be increased or decreased, according to the size of the product desired.

The squared edges of the ribs B will break off fragments of rock far better and more expeditiously than the ribs having rounded edges and the intermediate ribs give an added value to the rolls, since any fragments falling between them and the larger ribs will be further reduced in size. Furthermore, the product will be granular and not in the form of slimes.

What I claim is:

1. An ore crusher comprising, a pair of rolls, each provided with a series of parallel longitudinal ribs having squared working faces and edges and the working faces of the ribs being wider than their bases; the ribs of one roll projecting into the grooves of the other roll, but not contacting at any point with the ribs thereof, and means for imparting a high peripheral speed to the rolls.

2. An ore crusher comprising, a pair of rolls, each provided with a series of parallel longitudinal ribs having squared working faces or edges and intermediate parallel ribs of less width and radial length than the first named ribs; the larger ribs of one roll entering the spaces between the larger ribs of the other roll, but not contacting wit-h the ribs thereof at any point, and means for imparting a high velocity to the rolls.

3. An ore crusher comprising, a pair of rolls positively geared together and each provided wit-h a series of parallel longitudinal ribs having squared working faces and edges; the ribs of one roll entering the grooves of the other roll, but not contacting at any point with the ribs thereof, and means on one roll for imparting a high peripheral speed to the rolls.

4. An ore crusher comprising, a pair of rolls positively geared together and each provided with a series of parallel longitudinal ribs having squared working faces 0r edges and intermediate parallel ribs of less spaces between the larger ribs of the other roll, but not contacting with the ribs thereof at any point, and means on one roll for imparting a high velocity to the rolls.

5. In an ore crusher, a crushing roll provided with longitudinally extending parallel ribs having squared working faces and tapering inwardly from their outer longitudinal faces toward their base lines.

6. In an ore crusher, a crushing roll provi ded with longitudinally extending parallel ribs and intermediate parallel ribs of less radial length than the first named ribs.

7. In an ore crusher, a crushing roll provided with longitudinally extending ribs having squared working faces wider than the bases of the ribs, and intermediate parallel ribs of less width and radial length than the first named ribs.

In testimony whereof I affix my signature in presence of two witnesses.

ENOS A; WALL.

Witnesses:

CARL REDMAN, CHARLES C. LINK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatencs,

Washington, D. G. 

